How to Clean Mold From a Washing Machine? Remove Smell Fast

Dry towels should still come out with no musty odor, which means hidden moisture has been removed from the gasket, drum, and drawer after a hot maintenance cycle. Mold grows where water, soap film, and lint stay trapped, so the smell usually starts in seams, vents, and other dark spots.

Front-load seals, top-load tubs, and detergent drawers all can hold stale residue after normal laundry cycles. The steps below cover the problem areas, the cleaning sequence, and the habits that keep the odor from returning.

Where Mold Hides Inside The Washer

Rubber seals and detergent drawers trap the most moisture, which makes them the first places to check. Those parts stay damp, collect soap film, and grab lint until the surface turns slimy.

Wet Seams And Soft Gaskets

A front-load washer often leaves water in the door boot after a cycle, so black or gray spotting usually shows up in the folds. Consumer Reports points to that gasket as a common mildew spot because the folded rubber holds droplets where air barely reaches.

The drum may look fine while the lower lip, inner rim, and spray holes still hold residue. That matters because mold spores settle on damp surfaces and spread in enclosed spaces, which matches CDC guidance on moisture and poor ventilation.

Drawer Channels And Drain Paths

The detergent drawer, its housing, and the vent slots behind it often collect a paste of detergent, softener, and hard-water minerals. Whirlpool and GE Appliances both flag that buildup as a source of sour odor, especially in HE machines that use less water per load.

Hidden parts matter just as much. A clogged filter, drain pump trap, or low spot in the drain path can keep the washer wet long after the cycle ends, and that stagnant water feeds biofilm the same way a damp sink trap does.

EPA guidance on mold says moisture control comes before cleanup, so the real target is every place water lingers. Once the grime locations are clear, the prep step gets much easier.

Because water settles in hidden corners, the first job is clearing the machine for a thorough cleanup.

Preparing The Machine For A Deep Clean

Hidden water and stray laundry need to leave the tub before scrubbing starts. A washer that still holds moisture gives mold a head start the moment the surface gets wiped.

Clear The Drum And Cut The Power

Pull out every garment, sock, and washcloth. Pause the cycle safely or unplug the unit so the seal, drawer, and filter can be reached without the machine moving or starting on its own.

Check the bottom of the drum for pooled water. A cup, sponge, or microfiber cloth helps remove what the drain left behind, and a small flashlight makes the dark corners easier to inspect.

Gather The Right Cleaning Tools

Keep gloves, microfiber cloths, a soft brush, and a washer cleaner or bleach ready before starting. The CDC recommends basic protective gear during mold cleanup, and gloves keep hands away from residue and sharp drawer edges.

A nylon detailing brush works well on seam lines and drawer grooves. For cleaning agents, follow the machine label, since some makers allow bleach in a maintenance cycle while others point to a branded washer cleaner such as Affresh or Tide Washing Machine Cleaner.

“Open the door and detergent drawer now. Airflow matters as much as scrubbing, and a closed tub keeps damp residue in place while the work goes on.

Once the machine is dry enough to handle, the cleaning steps can actually do their job instead of pushing grime around the tub.

A dry interior sets the stage for cleaners to lift buildup instead of spreading it around.

The Cleaning Steps That Actually Remove Mold

The process starts with hand cleaning, then moves to a hot maintenance cycle. That order matters because a machine cleaner or bleach cycle can’t reach thick residue packed into seams.

Wipe The Seal, Drum, And Drawer By Hand

Pull back the gasket and wipe every fold with a damp cloth and a small amount of cleaner. Consumer Reports and manufacturer care notes from Maytag both point to the same pattern: residue sits deepest where the rubber folds back on itself.

Wipe the inner drum, the door lip, and the underside of the lid or door too. Those spots collect a thin mix of detergent, body oils, and lint, which behaves more like biofilm than plain dirt.

Run A Hot Empty Cycle

Use the hottest cycle the machine allows, then add bleach or a washer cleaner only in the amount the label permits. Hot water loosens soap film and helps move loose residue through the wash path, while the agitation pushes cleaner through the tub and hoses.

Chemically, bleach breaks down colored organic material and softens mildew stains, while a washer cleaner is made to target laundry-machine residue without the same harshness on some parts. Vinegar can help with mineral film, but it doesn’t do the same job on thick slime or a heavy odor source.

Scrub The Seams And Feed Channels

A soft brush and warm soapy water can clear the gasket folds, dispenser channels, and any dark seams that still feel slick after the cycle ends. The EPA says physical removal comes first, because loose growth and residue need to leave the surface before drying can finish the job.

Use a soft brush on corners near the detergent tray and around the door frame. A quick wipe isn’t enough here, since rough buildup often sits below the visible edge, like mud packed into shoe treads.

“A sour smell that survives one hot cycle usually means a pocket of residue still sits in a seam or filter, not that the washer needs another rinse.

Once the main body is clean, the gasket and drawer deserve a closer pass, because those parts can keep the odor alive even after the drum looks spotless.

Once the drum shines, lingering moisture in the seal and drawer can still feed the odor.

Front-Load Seal And Drawer Care

The seal and drawer trap the most water, so they need separate attention. A quick surface wipe leaves behind the same damp folds that caused the problem in the first place.

Pull Back The Door Gasket

Lift the rubber boot with your fingers and look all the way around the rim. Black specks, gray slime, and trapped lint often sit on the underside where the seal hugs the metal frame.

Wipe each fold with a cloth dipped in cleaner, then dry the rubber with a fresh towel. That dry finish matters because the EPA ties recurring growth to moisture that stays on nonporous surfaces after cleaning.

Remove And Wash The Detergent Drawer

Slide the tray out fully, then wash the tray, housing, and any small vent holes with warm water and a soft brush. GE Appliances and Whirlpool both call out the drawer assembly because softener film and detergent paste build up there fast.

Scrub the channel behind the drawer too. A removable tray can look clean while the cavity still holds sludge, and that cavity is one of the most common reasons a washer smells stale the next morning.

Dry The Parts Completely

Wipe the seal, tray, and drawer cavity until no droplets remain. Air drying helps, but a towel removes the last film faster, which matters in humid laundry rooms where evaporation moves slowly.

Front-load machines are especially prone here because the door seal and dispenser stay wet longer than the rest of the washer. Once those parts are dry, the next concern is keeping the smell from coming back.

When those damp spots finally air out, preventing the smell means changing the habits that invite it back.

Stopping Odors From Coming Back

Ventilation and detergent control do more for smell than a one-time scrub. A clean washer can sour again fast when soap residue and damp air stay inside after every load.

Leave The Door And Drawer Open

Crack the door after each wash so the tub can dry. Leave the detergent drawer open too, since a closed tray traps moisture in the same narrow channels where grime started.

ENERGY STAR and manufacturer maintenance advice point to the same habit: air needs a path through the machine. Without that airflow, the gasket stays damp and the smell returns like wet cardboard in a closed closet.

Use Less Detergent

Too much HE detergent leaves residue on the drum, dispenser, and drain path. A small overdose each week can build a film that seems harmless at first, then turns sticky enough to feed mildew.

Fabric softener adds to the problem because it coats surfaces. That coating grabs lint and body soil, which gives odor a place to settle even after a hot wash.

Set A Regular Maintenance Clean

Run a maintenance cycle on a steady schedule, especially in humid rooms or after a long stretch of cold washes. Whirlpool and Consumer Reports both point to periodic hot cleaning as the routine that keeps residue from stacking up.

• ▸Wipe after towels. Heavy towel loads leave more lint and moisture in the seal and drawer.
• ▸Check the filter monthly. A clogged trap can smell like mold even with a clean drum.
• ▸Use the right dose. Measure detergent for load size, not for odor anxiety.
• ▸Dry the rim. A quick towel pass after laundry keeps water from pooling in folds.
• ▸Air the laundry room. A small fan or open door helps the machine dry faster.

Those habits solve most odor problems, but a smell that comes back after a proper clean can point to something deeper in the machine.

Even good routines have limits, and a returning odor can signal trouble deeper inside the machine.

When A Smell Points To A Bigger Problem

A washer that smells musty again after cleaning needs a closer look at drainage and hidden water. That odor can come from a filter clog, a weak drain pump, or a hose that leaves water sitting inside the cabinet.

Check For Standing Water And Drain Trouble

Open the filter access panel, drain the water safely, and clear lint, coins, and sludge from the trap. A drain pump filter packed with debris can hold damp material that smells worse than the drum itself.

Persistent odor after cleaning often means the appliance isn’t drying fully between cycles. CDC guidance says moisture drives mold growth, so the fix has to address the wet source, not just the visible stain.

Watch For Return Growth

Quick reappearance of spots in the gasket or drawer housing points to ongoing moisture retention. A leak, weak ventilation, or a blocked drain path can keep the inside damp enough for growth to restart within days.

That’s where how to clean mold from a washing machine shifts from surface cleaning to problem solving. Clean the parts, then trace the water source, or the smell keeps coming back after every hot cycle.

EPA and CDC prevention advice line up on that point, because moisture has to leave the appliance or mold returns. A washer that stays wet isn’t finished with the problem yet.

That deeper issue keeps coming back until the appliance can fully dry between cycles.

Wrap Up

The cleanest washer still goes stale when water lingers in the gasket, drawer, or drain trap. The real fix is part scrub, part drying, and part habit, with enough attention to the damp corners that hold residue after every load.

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